The Ohio Democrat. (Logan, O. [Ohio]) 1886-1906, 1887-10-29
SCIENCE AND INDUSTRY.

1t is said that the Belgian glass
workers are now preparing to make
glass into various shapes and patterns
by running sheets of it at just the right
temperature to work nicely through
steel rollers.
The question as to what is the exact
mechanical equivalent Of heat has long
puzzled engineers. The latest experi-
ments show that one pound Of water
raised one degree Fahrenheit, is equal
to one pound lifted 769 feet. Philaiel-
phia Record.
The Pittsburgh Iron World says
that Pittsburgh stecl-makers have es-
tablished agencies for the sale of the
| finer grades of steel suitable for making
cutlery in Europe, India and Australia.
Their sales have been so considerable
as to practically guarantee an cstab-
lished trade. Steel has been sold in
competition with an nglish-made arti-
Gle Mt the same price.
AN investigation as to the height
of summer clouds, made in Sweden.
under the auspices of the Royal Scien-
tiiic Society of Upsala, shows that
clouds occur most frequently at heights
of twcnty-three hundred and fifty-five
hundred feet. In the summers of 1884
and 1885. the loftiest cloud observed at
Upsala was forty-one thousand feet
above the earth's surface, or nearly
eight miles.-N. Y Ledger.
During five school years the director
of the Royal Deaf-Mute Institution at
Copenhagen has made semi-durnal
measurements of the height and weight
of the children under his care, and he
deduced number of condolences be-
tween variations in their weight and
those in the temperature of the air.
ArkansaU TraUeier.
The copper mining business nae
fallen to a very low ebb in Russia. 1t
is reported that out of 1853 copper
mines in the Ural Mountains only
twenty-eight are being worked. The de-
cline of the industry is attributed to tho
destruction of the surrounding forests
and the consequent scarcity of fuel,
acting in conjunction with great diff
culties of transport.
The bottle industry is very large
one, the number produced per day in
the respective countries being estimated
rs follows: Great Britain and Ireland,
9,2o6; Sweden. $50; Norway, 600; Dem
mark, $50; Germany and Belgium, 3O,-
O39; Austria, 1000; France, 1O0 United
States, $40; Canada, 120; Australia,
2O7; total, 46, 432 gross. With 800 work.
ing days this gives no fewer than 49,
929, 900 gross per year.
"A new building material called
e-brick, harder than the hardest
clay-brick, is made from simple mortar,
but u scientifically made and perfect
mortar; in fact, hydraulic cement,
and the grinding together of lime and
sand in n dry state-including also
some alum:na, which is usually present
in sand-and the subsequent heating by
steam, give the mixture the properties
of the burned hydraulic cements at
present in use.-Pubtic Opinion.
: During August there were 1000
freight ears required to carry California
shipments to the East. The amount
carried, in pounds, was 10000, 900, and
of that enormous quantity over one.
I half, 20,500,000 pounds, consisted oi
green, dried and canned fruit. The
: railroads carried 100000 pounds OF
sugar and 5000, 900 pounds of tea. The
S last article was imported, of course
$ and transhipped, as was also part o.
the remainder of the 40, 100000 pounds
y San Francisco Examiner.